cnn's robyn curnow was in the courtroom today. she's "outfront" in johannsburg tonight. robyn, let me ask you about the testosterone first. there's been a lot of talk about that speculation, about whether he could have been on testosterone or steroids and this could have been some sort of a roid rage. how did the defense respond to the prosecution talking about those boxes of prosecution? >> they kind of took down the investigating officer quite quickly, because they said to him in this quite amusing exchange for the court as they watched it, they said, well, how do you know this is testosterone? and the investigating officer said, well, i just read the label. and he said, well, have you had it tested yet? and he said, no, no, not yet, we're still testing the substance. and oscar pistorius's lawyer said, if you went to any pharmacist, you could have found this is a herbal medication. >> let's talk about the other claim that could potentially be damning. the prosecutor says they have witnesses who heard nonstop shouting that appeared to be coming from the pistorius home.